Definition
A device used in aircraft engine cooling systems that uses the high-velocity flow of engine exhaust gases through a shrouded duct to create a low-pressure area, which draws additional cooling air across the engine cylinders.
Plain English
A tube around the engine exhaust that uses the fast-moving exhaust to suck extra cooling air past the engine, helping it stay at the right temperature.
Context Anchor
Seen in aircraft engine exhaust and cooling system descriptions, especially where an engine uses augmentor tubes to help move cooling air.
Derivation
From Latin 'augere,' meaning 'to increase' or 'to enlarge.' An augmentor 'augments' (increases) the natural airflow through the engine compartment beyond what ram air alone would provide.
Why Pilots Care
It can improve engine thrust and cooling efficiency, which affects climb performance and engine longevity.
Intuition Check
An augmentor is not a separate engine or power source. It increases airflow by using exhaust flow that is already being produced.
Example Sentence 1
The mechanic inspected the augmentor tubes for cracks during the annual inspection, since damage there can reduce engine cooling.
Example Sentence 2
During preflight the mechanic checked the augmentor tubes for blockage.